Recently published Ornithological Works. 125 
While offering these small criticisms upon our friend's 
labours, we may also express a hope that lie will not adopt 
the numerous minor subdivisions of Nectariniidse that have 
lately come into fashion, founded, not on structural form, 
but simply on styles of colour. There is no sort of advan¬ 
tage to science gained by the employment of such terms gene- 
rically. Even our author’s Urodrepanis (gen. nov.), founded 
upon the Atthopyga christince of Formosa, as having the “ two 
centre tail-feathers abruptly narrowing into very fine points," 
seems to us rather unnecessary ! It would likewise be a much 
more comfortable plan if the plates and descriptions of the 
same species were issued together in the same part. To effect 
this might give some little trouble to the author, as we are 
aware; but it would be a great convenience to the subscribers. 
The f Monograph of the Sun-birds' will be completed, as 
we learn from the prospectus, in twelve Parts, “ which will 
be published as rapidly as possible consistently with a proper 
execution of the plates." We cordially wish our author suc¬ 
cess, and trust that all our friends and readers who have the 
opportunity will not fail to assist him with specimens and 
intelligence. 
10. Boucard’s c Catalogus Avium 9 
[Catalogus Avium hucusque descriptarum. Auctor Adolphus Boucard. 
London: 1876. 8vo, pp. 350.] 
This is a list of the names of the species of birds, with a 
slight indication of their patrice, beginning at the Struthiones 
and ending with the Trochili. Mr. Boucard recognizes 11,030 
species, divided into 2456 genera. 
Mr. Boucard has compiled his catalogue from Gray's f Hand¬ 
list/ Sclater and Salvin's f Nomenclator Avium Neotropica- 
lium/ and Sharpe's f Catalogue' (vols. i. & ii.), and has pro¬ 
duced a handy volume which will certainly not be without 
use to ornithologists. He has a more ambitious project in 
view—that is, a f Genera of Birds,' of which the present work 
is merely a forerunner. The classification adopted is nearly 
that of the f Nomenclator Avium Neotropicalium ' reversed. 
There are a good many misprints; and the names of the new 
